1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe22501cb79edd0cf58d0a684886d986344a8bfdee6ab7c1d15be5061bc1acf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a760fc86-986a-4c94-be52-42d71e567a73.json and https://artists.proofprofile.net/proofs/artist/a760fc86-986a-4c94-be52-42d71e567a73.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa269b47adfd3025fc40d64285ec5778e0650907215aec5b881239e8b0d51aafd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be407c42ad290e06d0310a66d1de8b080524a64dd1efd4f8f6057f8c3d83053. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd10ae73da6f5ce8912d2e906a85de053464354c43b8ba71d93c83bed1dbe57f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d18a5b7d163ebeef35d6b4a760bcd2496e21dabf3d434d0ff7cf2339edcb06. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e9d9f1ce01f954e1d487db09553ca630effa7eeb99dfb58f9a9c1ffc206625. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a996aa365d3903fd3f8143d2a891fce48d9ef394a7454e8a1221e61ab85f9dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b385d48a5f11b63d51439ab5b5a44d6b6e05aa5c8ee488ebabd81d4ffb7b2b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6ef67739f6f0616e6c1c366978461f05d5b469a24b53dcde43746f1d0c975d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8e53b4ac08460f5a4f26c5162c745f1a3466ad3ec1f133ae60dead98facbe4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87148ae081c90e178fc137fcecb636835f9e5a3d7345fddbe16cfbf6bdc69d39. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UAKR11500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd924866dbabd9fa006d8c9917f9cabf1062f91ebb296769055f331a79b62ca5d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UAKR11500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7b087c0d1f2c3374db80df1767d5ec7d49d248c2139e8e7f4838891697680a. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864327.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee56d21c1bb3067c9abc4086058468f823fe8b322d50757a19e110b4c9075526. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b21e5f8b844c2e1f99fd5098955835356521d8248bd9656dbb4b4623a60c598. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ee1e1c837107b5ecb46d03a8a86b4ce98b1ea698560a17770d1c9740622e2a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76235c969f8bdf07c75019f5f1d6c358bfc25318c70c811a4a2c66a00d4bad9. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b305df63f62485414b5664036e299c29c56fdee3e0593ce5a1c83852404fac. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3337e9eda1b039b06d82b583cee336a520339a28e37e24d855007ed25b7e36c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCADT1864332.